Where is Son Doong Cave? The world’s largest cave located in Quang Binh province, Vietnam. Its grandeur, unique terrain and beautiful scenery will give visitors an impressive and overwhelming experience.
Originally discovered in 1991 by a Vietnamese man called Hồ Khanh, Sơn Đoòng Cave is located in the Phong Nha–Kẻ Bàng National Park, Quảng Bình, and was recognised as a world natural heritage by UNESCO.
According to Oxalis Adventure, with over 9km with sections reaching up to 200m tall and 150m wide, the cave has enough space for an entire New York city block complete with 40-story skyscrapers.
“Sơn Đoòng Cave is so large that it even encompasses its own river and weather system inside. Two giant dolines allow sunlight to penetrate into them forming the lush tropical jungle and a unique ecosystem and some large stalagmites are more than 70m high, and many other secrets yet to be discovered,” Oxalis Adventure wrote on their website.

Before Sơn Đoòng Cave, Hội An, Khuê Văn Các of the Temple of Literature and the terrace fields in north-western Việt Nam also appeared on Google Doodle.
According to Wikipedia, a Google Doodle is a special, temporary alteration of the logo on Google’s homepages intended to commemorate holidays, events, achievements, and notable figures of particular countries.
Visitors who are interested in Sơn Đoòng Cave but have not yet had the opportunity to visit can explore the place through Wonders of Vietnam — an online exhibition on Google Arts & Culture launched at the beginning of 2021.